Drill-tool shaper.



N o. 654,072. f Patented'luly I7, |900.

L. F. NELL.

DRILL TUUL SIIAPER.v (.'xppuuon med my 5, 19Go.)

(No Modal.)

llililvimiuiim.

A TTOHNE-YS l LOUIS F. NELL, OF DENVER, rCOLORADO,ASSIGNOR OF ONE-HALF TXVILLIAM MQWATKINS, OF SAME PLACE.

DRILL-Tool. SHAPER.

SPECIFICATION forming part of Letters Patent No. 654,072, dated July1'7, 1900.

Application led May 5, 1900. ySerial No. 15,607. (No model.)

,To all whom it may concern: Y

Be it known that I, LoUIs F. NELL, of Denver, in the county of Arapahoeand State of Colorado, have invented a new and useful lmprovement inDrill-Tool Shapers, of which the following is a specification.

The object of my invention is to enable pros. pectors and othersoccupied in rock-drilling whoare unable to make their own bits toquickly and conveniently produce the same without the exercise of skillor to enable those who are skilled to produce the bits in less time andwith less labor.

To this end my invention consists in the special construction andarrangement of the parts of the device, as will behereinafter describedwith reference to the drawings, in which- Y Figure lis a side elevationof my improved tool-Sharpener as in use. Fig. 2 is a vertical section onthe line 2 2 of Fig. 1,-and Fig. Sis a horizontal section on the line 33 ofFig. 2.

In the drawings,A is acast-iron base of any suitable shape, havingformed with it at its upper surfaces two lugs A/ A2 of differentheights, forming a seat or channel-way between them. Between these lugsis seated a steel die-block B, held in place by a screwbolt C, tappedinto the under side of the same from the bottom of the cast-iron base.The die-block B 'has in its upper portion a V- shaped groove or channelb through it, which iiares out to a little greater width and depth inthe middle and terminates at its bottom in a narrow slit or throat b',having parallel sides and which latter at its lower end enters anenlarged chamber or pit b2, which extends horizontally all the waythrough the die-block. The V-shaped groove in the upperend of block Bisof a shape to give the proper form to the chisel-shaped end of thedrill-tool, and in this groove the drill-tool is heldin upright positionand is swaged or brought into shape by being heated and drivendownwardly into the throat by thel blows of a hammer delivered on theupper end of the tool being formed. To hold the tool in uprightposition, two pins D and D', which I term rests, are arrangedhorizontally in the higher lug A of the base, the pins overhanging theV- vshaped groove and extending across the base. d and dt, that overlapthe metal at the front 'side of the slot, and have'washers d2 d4 andgroove at equal distances on opposite sides of the center of the same.These two pins form supports to maintain the drill-tool upright while itis being swaged into shape in order to accommodate ditferent widths oftools and also to permit the tool to be canted or tilted from side toside in rounding the edge, as shown in dotted lines in Fig. 2.

These two pins are made adjustable to and from each other, as follows:The pins are made with square reduced shanks having round screw-threadedends, which shanks lie in a horizontal slot c, out in the lug A of theThe reduced Shanks have shoulders nuts d3 d5, that overlap the metal atthe rear side oftheslot, so `that when the nuts are turned up the pinsare tightly clamped and held to their adjustment; but they` may beadjusted to or from each other, as may be required.

Atan intermediate point between the two rest-pins a screw-plu g E istapped into threads in the upper andlower faces of the slot aand has anick e' at its front end for the insertion of a screw-driver, by whichsaid plug may be turned. By turning the screw-plug to or from theV-shaped groove it is made to form an adjustable back bearing for thetool as it lies between the rests, and isthus made to accommodate toolsof various thicknesses, always permitting them to' bel exactly centeredabove the V-shaped groove.

When the drill-tool is to be made, a section of steel rod is heated androughly-beaten at one end into chisel shape, and it is then again heatedand placed between the Frost-pins and forcibly driven downward by blowson its upper end into the die-block, which causes its lower end to bethinned and brought tothe `out fan-shaped the tool is from time totimetilted from the vertical line and hammered upon while in this position,by which action the lower curved edge of the tool may be brought to therequired degreeof roundness.

rlhe value ofthe ,special construction of the die-block B is that thescaleiand accumulated dust do not gather in the apex of the V- Iooshaped groove, but pass out of the throat b into the receiving-pit b2,where they pass out at each end. The metal at the lower edge of the toolis therefore not blunted or opposed by the accumulation of dust at theapex, but spreads freely down to a comparatively-sharp edge, and as thescale passes away automatically and is not held to the face of the toolthe latter is planished or swaged to a perfectly-smooth face thatpermits of perfect inspection as to color in tempering the same.

In constructing the cast-iron base the lugs A'A2 are made heavy enoughto serve the purpose of an anvil for roughly beating the drill-pointinto shape.

I am aware that a drill-Sharpener has been heretofore devised in whichtwo separate dieblocks were arranged to form a tapering throat intowhich the drill end was to be driven, and I make no claim to thisconstruction.

Having thus described my invention, what I claim as new, and desire tosecure by Letters Patent, is-

1. A shaper for drill-tools,&c. ,consisting of a single die-block havingin its upper portion a tapering groove or channel and a discharge-throatfor the scale, Sac., opening into the apex of said tapering channelsubstantially as and for the purpose described.

2. A Shaper for drilltools,&c. ,consisting oi` a single die-block havingin its upper surface a tapering groove or channel, a dischargethroat forthe scale, tbc. openinginto the apex of said tapering channel, and restsor supports for the drill-tool substantially as described.

3. A Shaper for drill-tools,&c. ,consisting of a single die-block havingin its upper portion a die-block, a base having a lug extending abovethe die-block and provided with a horizontal slot, and two rest-pinsarranged in the said slot and made adjustable toward each other asdescribed.

6. A Shaper for drill-tools,&c. ,consisting of a die-block, a basehaving a lug extending above the die-block and provided with ahorizontal slot, two rest-pins arranged in the p said slot and madeadjustable toward each other,and an adjustable back bearing between therest-pins for the tool being operated on substantially as described.

7. The combination of the base A having lugs A' A, a detachabledie-block between them, and screw-bolt C tapped into the diei block fromthe under side of the base substantially as shown and described.

In testimony whereof I have signed my name to this specification in thepresence of two subscribing witnesses.

LOUIS F. NELL.

Vtnesses:

GEO. E. HOWARD, THEO. HOWARD SMITH.

